Accelerated Effect of Ferric Salts on Degradation of Thiophosphate Fungicide, Tolclofos-methyl by Zerovalent Iron

Min, Zaw Win; Kim, Tae-Hwa; Shin, Jae‐Ho; Lee, Sangman; Kim, Jang-Eok

doi:10.3839/jksabc.2009.113

Cited by 13 publications

(8 citation statements)

References 30 publications

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“…This degradation of chlorpyrifos in the ZVI system was owing to the reduction or adsorption of chlorpyrifos on the ZVI surface. These results were in agreement with the findings of Kim et al [22], and Min et al [21], who studied the degradation of chlorpyrifos, and tolclofos-methyl using ZVI in different concentrations.…”

Section: Resultssupporting

confidence: 93%

“…This difference might be attributed to the lower specific surface area of annealed Fe 0 (0.134 versus 2.55 m 2 /g for unannealed Fe 0 ) and its resistance to corrosion in aqueous solutions [20]. A similar trend was reported by Min et al [21], who stated that unannealed ZVI is more effective for degrading tolclofos-methyl in aqueous solutions than are other zero-valent metals. In order to achieve a better understanding of the ZVI-mediated degradation of chlorpyrifos, in this study, uZVI was considered an abiotic catalyst on the basis of its degradation efficiency.…”

Section: Resultssupporting

confidence: 60%

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Enhance degradation of insecticide chlorpyrifos by iron salts and potassium persulfate during zerovalent iron treatment in aqueous solution

Rahman

Hwang

Kwak

et al. 2018

JABC

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Degradation of the insecticide O,O-diethyl O-3,5,6trichloro-2-pyridyl phosphorothioate (chlorpyrifos) in aqueous solution was investigated using iron salts and potassium persulfate during ZVI treatment through a series of batch experiments. The degradation rate of chlorpyrifos increased with increases in the concentrations of iron salts and potassium persulfate in the aqueous system. Ferric chloride was found to be the most effective iron salt for the ZVI-mediated degradation of chlorpyrifos in aqueous solution. Further, the iron salts tested could be arranged in the following order in terms of their effectiveness: FeCl 3 > Fe 2 (SO 4) 3 > Fe(NO 3) 3. The persulfate-ZVI system could significantly degrade chlorpyrifos present in the aqueous medium. This revealed that chlorpyrifos degradation by treatment with Fe 0 was promoted on adding ferric chloride and potassium persulfate. The kinetics of the degradation of chlorpyrifos by persulfate-amended Fe 0 was higher than that for iron-salt-amended Fe 0. This suggests that using a sequential Fe 0 reduction-ferric chloride or Fe 0 reduction-persulfate process may be an effective strategy to enhance the removal of chlorpyrifos in contaminated water.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 60%

Enhance degradation of insecticide chlorpyrifos by iron salts and potassium persulfate during zerovalent iron treatment in aqueous solution

Rahman

Hwang

Kwak

et al. 2018

JABC

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“…But in this case, it was found that Fe powder is least efficient for the removal SA from aqueous solutions. The degradation of contaminants by zero‐valent iron depends on the sizes and concentration of the catalyst, the storage condition of the catalyst, the duration of the storage, the source of zero‐valent iron and the mineralogy of surface oxide coating . Figure shows the comparison of SA removal efficiency of different species of iron such as, Fe 0 , Fe 2+ , and Fe 3+ as a catalyst in EF process.…”

Section: Resultsmentioning

confidence: 99%

Electro‐Fenton Oxidation of Salicylic Acid from Aqueous Solution: Batch Studies and Degradation Pathway

George

Gandhimathi

Nidheesh

et al. 2014

CLEAN Soil Air Water

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This study investigated the removal of salicylic acid (SA) from aqueous solution by electro-Fenton (EF) and EF-like processes using graphite-graphite electrolytic system. Fe 0 , Fe 2þ , Fe 3þ ions were used as the Fenton reagent in the EF process and in the EF-like reactions, Cu 2þ , Mn 2þ , Ni 2þ were used as the same. The effect of various operating conditions on the effectiveness of EF process was investigated. The contribution of adsorption and electrosorption in the removal of SA was also investigated. According to the results, EF method can be used efficiently for the removal of SA by maintaining proper operating conditions. Fe 2þ was confirmed to be the most efficient catalyst among the metal ions that were tested. Maximum removal efficiency of 75.13% was obtained under optimal operating conditions after 8 h of electrolysis. Even though EF-like processes are also effective for the removal of SA from aqueous solutions, EF removal of SA was observed to be more efficient for the same. Gas chromatography-mass spectrometry (GC-MS) of SA solutions electrolyzed at optimal conditions was carried out. Degradation pathway was proposed from GC-MS.

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“…In other words, to render Al and Zn (and other aqueous reactive metals) suitable for environmental remediation, tools have to be found to avoid the formation of an impervious oxide-film on their surface. Despite this evidence, researchers are continuing to discuss the suitability of conventional Zn 0 for aqueous contaminant removal [42][43][44][45][46][47][48]. For Al 0 , Bojic et al [39,[49][50][51] have presented an efficient micro-alloyed composite.…”

Section: Mechanism Of Aqueous Contaminant Removal By Fementioning

confidence: 99%

On the mechanism of microbe inactivation by metallic iron

Noubactep¹

2011

Journal of Hazardous Materials

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This letter challenges the concept that the metallic iron (Fe(0)) surface contributes directly to the process of micro-organism inactivation in aqueous solutions. It is shown that any antimicrobial properties of Fe(0) is related to the cycle of expansion/contraction accompanying aqueous iron corrosion. This demonstration corroborates the concept that aqueous contaminant removal in the presence of Fe(0) mostly occurs at the Fe-oxide/water interface or within the oxide-film on Fe(0).

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Accelerated Effect of Ferric Salts on Degradation of Thiophosphate Fungicide, Tolclofos-methyl by Zerovalent Iron

Cited by 13 publications

References 30 publications

Enhance degradation of insecticide chlorpyrifos by iron salts and potassium persulfate during zerovalent iron treatment in aqueous solution

Enhance degradation of insecticide chlorpyrifos by iron salts and potassium persulfate during zerovalent iron treatment in aqueous solution

Electro‐Fenton Oxidation of Salicylic Acid from Aqueous Solution: Batch Studies and Degradation Pathway

On the mechanism of microbe inactivation by metallic iron

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